Grinding-mill.



A. S. HAGERTY.

GRINDING MILL.

APPLICATION FILED MAR. 4, 1915.

1,164,808. Patented De0.2l, 1915.

3 SHEETS-SHEET I.

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A. s. HAGERTY.

GRINDING MILL.

APPLICATION FILED MAR. 4, 1915.

1,164,808. Patented Dec. 21, 1915.

3 SHEETS-SHEET 2.

A. S. HAGERTY.v

GRINDING MILL. APPLICATION FILED MAR. 4, 1915.

1,164,808. Patented Dec. 21, 1915.

3 SHEETSSHEET 3.

COLUMBIA PLANOGRAPH cc., WASHINGTON, D. c.

ALMON' s. HAGERTY, or rnonra, ILLINOIS.

GRINDING-MILL.

T 0 all w ham it may concern Be it known that I, ALMoN citizen of the United States, Peoria, in the county of Ieoria and State of Illinois, have invented certain new and useful Improvements in Grinding-Mills, of which the following is a specification.

My invention relates to grinding mills of the class employed for grinding grain, coffee, spices, charcoal and the like, and for breaking and degerminating grain.

My object is to improve upon mechanism intended to effect the purposes above enumerated and to reach new results.

My invention in milling or grinding machines is related to the class wherein a relatively stationary concave member or breast, is employed in connection with a rotatable grinding cylinder or bur.

My invention consists in the formatlon, arrangement and adjustment of parts relatively to effect the grinding function and comprises a rotatable grinding cylinder or bur, its surface serrated on lines tangential with relation to its axis; a normally stationary breast member adjustable to different tangential angular relations to the surface of the grinding cylinder, and serrated; adjusting means for the breast; reinforcement or backing for the breast and adjustable support therefor; resilient means effective to safeguard the breast against injury resulting from the introduction of nongrindable elements between the working surfaces of the breast member and the grinding cylinder; and details of construction relating to the grinding elements and their necessary accessories to carry out the purposes and functions of the invention.

I have, by the drawings herewith submitted, shown one form of embodiment of my invention, and referring to the same- Figure 1 is a side elevation of my invention; Fig. 2 illustrates an elevation on the opposite side from that disclosed in Fig. 1; Fig. 3 is a plan view of my invention with the hopper removed; Fig. i is a front end view with the hopper romovedand certain parts omitted; Fig; '5 is a longitudinal, sectional view on the line a'a of Fig. 3. Fig. 6 is a detail view of serrated portions.

My experience has brought me into contact with, and has developed on my part very extensive and accurate knowledge, of past and present machinery and methods S. HAGERTY, residing at Epecification of Letters Patent.

Patented Dec. 21, 1915.

Application filed March 4, 1915. Serial No. 11,964.

employed for grinding purposes. The cooperating, oppositely turninggrinding cyl- 1nders or burs used in successive pairs for reductlon purposes, represents one method, and the only one, which to my knowledge has been and is at the present time being actively employed. I am also familiar, through representations in the patent art, w th a proposed method and varlous mechanisms, in which a single rotatable cylinder or bur is employed in connection with a relat vely stationary breast, the latter, in one lnstance at least, being concaved uniformly and generally designed for conformity with the arc of the cylinder or bur.

I have not been 'able to get, from the double crushing roll system, the full or even approximate result obtained by my struc-' ture. I have not known of a single instance of a machine being practically used in which a stationary breast member was employed in conjunctionwith a rotary bur or cylinder and in those exemplifi-cations of the art referred to, the resultant use of same 1s only effective for crushing purposes, and of the others there is no means of relative ad ustment between the member and the cylinder to accommodate their use in conunction with different grains or for modifying the grinding or cracking effect. By my structure I am able to handle all kinds of grain, either for cracking, degerminatmg or grinding, and am also able to use my machine for grinding other materials, as for instance, charcoal, and sugar, to the finest powdered conditions.

Referring to the drawings, 2 and 3 are respectively upper and lower frame members; at and 5 are vertical members of a main framework.

6 is a shaker member and 7 guards or deflectors. Connections are shown in the drawings to effect the shaking action, but as this feature does not constitute any part of my invention, I shall omit detail description and reference.

8 is a frame or base member of anupright frame portion supported upon the mam frame and adapted to contain the grinding members of the machine, and 9 is a hopper member which forms the upper part of said upright frame portion.

' 10 is a feed roller disposed at the outlet from the hopper.

In practice, I may use a shaker member I or belt-wheel 15.

for feeding to the grinding elements instead of the feed roller. 7

11 is a grinding cylinder serrated as at 12 on lines tangential with the axis of the cylinder, the axle shafting portion 13 of said cylinder being supported in suitable boxings as 14 upon the upper main frame part. On one endof shaft 18 is provided the band The otherelement of the grinding mechanism comprises a breast plate 16 which is preferably serrated on lines parallel with relation to the axis of cylinder 11, such serrations being preferably in ratio as to number with relation to the serrations on the grinding cylinder, of about 6 for the breast plate to l on the cylinder.

I support the breast plate from a turnable bar as 17, by meansof screwsas 18 supportedi'n said bar, engaging threaded portions in'saidbreast plate. Bar 17 is journaled in boxings as 19 at either side of the main framing, and said boxings are in turn carried in" extended seats in standards or up right portions 20 in conjunction with en-' gaging set screws as .21 at either side thereof, which said set screws hold the shaft in place and define its relative positionrwithin' said seat through proper adjustment thereof, this adjustment feature of shaft'19 serving generally to space the breast plate from p the surface ofthe cylinder.

. lation both with the breast The angular or tangential relation of the breast plate to the surface of the cylinder constituting a material and essential element to the successful working of my machine, I have provided means for changing said directions.

angle, which comprises an adjusting bar 22 extending across the machinein parallel replate and supporting bar 17, which bar is provided with a cam surface or surfaces as 23 disposed relative to the breast plate so that the turning of adjusting shaft 22 will effect a moveplate to angles within certain defined limits and related also in a manner tobring into play certain yielding ten- 1 sion members hereinafter pointed out and defined. I

To effect a ready adjustment of the breast plate 16 to different tangential or angular positions with relation to the cylinder 11, I

have provided an'arm 24 which is secured to one end of adjusting bar 22 and extending downwardly may be perforated at its lower end, as shown, to receive a rod as '25, the

. latter suitably supported in connection with said nuts and said arm,

the 'machine framing said arm being designed to turn adjusting shaft 22. The particular means herein employed for the purpose comprisesnuts 26, 27, disposed at either side of said arm 24 and upon threaded parts of rod 25, there being interposed between equivalent resilient members 28, the adjustthe springs or mentor movement of bar 24 being effected by the turning of said nuts in the proper The normal tension of the resilient members is designed to be such that the breast plate 16 will be held through its connections against abnormal yielding and suii'iciently permanent to meet normal conditions of grinding, but are yieldable under abnormal tension such as would be efiected where a non-grindable substance were passed between the grinding surfaces.

vThe cam member or members upon the adjustingbar 22, as heretofore noted, are disposed with relation to the breast plate so as to act a lever to be turned by said adjustingbar, that is, the contact is sufliciently ofi' center that resistance may, through the cam arm, turn said bar. f

In the practical working of my machine, I have distinctly avoided the possibility of any crushing action between the grinding members, and to this end have continued-the serrations of the breast plate to its top edge, and in adjustment forgrinding and cracking purposes, the upper edge of the breast plate, while uniformly being'disposed at a greater distance from the surface of the grinding cylinder than at any otherpart', is still close enough that the grain, of whatever character, cannot be received as a whole cure a slight shearing'actionwhich is essen-v tial in the initial engagement of the grain between the grinding surfaces to take secure hold thereof, and subsequently, as the reduced portions pass between the grinding surfaces, the angular disposition of the serrations serves the same continuing purpose. I have shown. in the structure herein disclosed but a single set of grinding elements. It may be necessary for reductionpurposes that additional sets with varying depth and width of serrations be provided to carry out the full purposes of the machine, and I may *multiply the sets in a single machine; however, this would amount to mere double use of my invention and hence I have not seen fit to extend the illustration further upon those lines. j

' The parts and arrangement of my'device, as herein disclosed, exemplify but one form of "embodiment, but the parts may be difierently formed and arranged to meet the purposes of use, and therefore I claim all" forms support to dispose of embodiment or arrangement of parts that fall legitimately within the spirit of my invention.

What I claim is:

1. In a grinding mill, in combination, a frame, a rotatable cylinder thereon, a concave breast plate normally stationary with relation to the movement of the cylinder, but adjustably mounted to establish differing spacing relation and differing tangential positioning relative to the surface of the cylinder, a support for said breast plate, and means for tilting the breast plate upon its the same at differing tangential positions with relation to the surface of the cylinder comprising a rocker arm connected with the breast plate support, a rod provided with threaded portions connectible in a sliding relation with the lower end of to vary the said arm, and set nuts on the threaded por- I tions of said rod, and resilient means interposed between the arm and the respective set nuts for holding the arm under resilient tension.

2. In a grinding mill, in combination, a frame, a rotatable cylinder thereon, a concave breast plate normally stationary with relation to the movement of the cylinder but adjustably mounted to establish different spacing relations and tangential positioning relative to the surface of the cylinder, a support for the breast plate, an oscillating shaft supported by the frame adjacent the lower end of the breast plate and provided with an eccentric for engaging the breast plate, an arm secured to one end of said shaft, and adjustable tensioning means engaging said arm for yieldingly holding said arm and shaft in adjustable positions whereby the eccentric may engage the lower end of the breast plate to maintain the latter yieldingly in adjusted positions.

3. In a grinding mill, in combination, a frame, a rotatable grinding cylinder thereon, a concave breast plate pivotally mounted at its feed end in bearings adapted to bemoved laterally to and from the cylinder, adjusting means for moving said bearings distance between the feed end of said breast plate and the cylinder and to hold said breast plate from further lateral movement after adjustment, and a support for the free end of said breast plate comprising an oscillating shaft, an eccentric on Copies of this patent may be obtained for said shaft engaging the breast plate, an arm secured on one end of saidshaft, and adj ustable tensioning means engaging said arm for yieldingly holding said arm and shaft in adjusted position whereby the eccentric may engage the breast plate and maintain the latter yieldingly in adjusted position.

4:. In a grinding mill, in combination, a frame, a rotatable grinding cylinder thereon, a. concave breast plate pivotally mounted at its feed end in bearings adapted to be moved laterally to and from the cylinder, standards on the frame, elongated seats on said standards for the breast plate bearings, screws at opposite ends of said seats for moving said hearings to vary the distance between the feed end of the breast plate and the cylinder and to hold said bearings fixed after adjustment, and an adjustable means comprising an oscillating shaft, an eccentric thereon, and a tensioning device for supporting the free end of the breast plate.

5. In a grinding mill in combination, a frame, a rotatable grinding cylinder thereon, a concave breast plate pivotally mounted at its feed end in bearings adapted to be moved laterally to and from the cylinder,

adjusting means for moving said bearings to vary the distance between said breast plate and the cylinder and to hold said breast plate from further lateral movement after adjustment, and yielding means for adjusting the free end of the breast plate with respect to the cylinder, said means comprising an oscillating shaft, an arm on one end of said shaft, a rod pivoted at one end to the frame of the mill and passing freely through an opening in the outer end of said arm, two springs mounted on said rod, one on each side of said arm and bearing on the arm, a nut for tensioning each spring threaded on the rod, and an eccentric or cam fixed on the shaft to bear against the free end of the breast plate to move the same toward the cylinder when the springs are properly tensioned and permit the breast plate to yield under abnormal conditions.

In testimony whereof I have afiixed my signature in presence of two witnesses.

' ALMON S. HAGERTY.

Witnesses:

MARY E. CoMEeYs, H. V. GIBsoN.

five cents each, by addressing the Commissioner of Patents, Washington, D. C.

the feed end of I 

